<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        function getRes(num1, symbol, num2) {
            switch (symbol) {
                case '+':
                    return num1 + num2;
                    break;
                case '-':
                    return num1 - num2;
                    break;
                case '*':
                    return num1 * num2;
                    break;
                case '/':
                    return num1 / num2;
                    break;
                    default:
            }
        }
        // alert(getRes(7,'+',6));

        function getMaxt(num1,num2) {
            if (num1 > num2){
                return num1;
            }else {
                return num2;
            }
        }
        function getSu(num1) {
          var count = 0;
          for (var i = 1;i<=num1;i++){
              if (num1 % i == 0){
                  count++;
              }
          }
          if (count == 2){
              return num1;
          }else{
              return false;
          }
        }
        alert(getSu(67));
    </script>
</head>
<body>

</body>
</html>